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Analysis

  • max time kernel
    74s
  • max time network
    76s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2022, 14:51

General

  • Target

    file.exe

  • Size

    405KB

  • MD5

    eabf529b6670896aa7be9ebf12c8c4be

  • SHA1

    c11ba0946fb54213f128152214b201e438e77003

  • SHA256

    9c6e7d1cc84f620c9f9d01c11bb7bdc1e7b8412b7698aed8b836cc386e089031

  • SHA512

    6cfd6dbd1ce910579827698ffb4383a68ca50503bbfa83e875d762e29a8c64a077e52b4eaedd8d6ee23c74cc9541cfc6674504106e2bec307b2ab08b265b0f39

  • SSDEEP

    6144:+oe0SgPX/qIy7F3Ulc1pRs30Va2l2lU7dzQW1LrrwVfquS:+o/X/qWsRKZK7+4rd

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\ArToWLGfDyUGsf.exe
      2⤵
      • Executes dropped EXE
      PID:612
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1564
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "file.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1072

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\ArToWLGfDyUGsf.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\ArToWLGfDyUGsf.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1100-57-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1100-59-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1100-58-0x000000000058A000-0x00000000005BA000-memory.dmp

    Filesize

    192KB

  • memory/1100-54-0x00000000763F1000-0x00000000763F3000-memory.dmp

    Filesize

    8KB

  • memory/1100-55-0x000000000058A000-0x00000000005BA000-memory.dmp

    Filesize

    192KB

  • memory/1100-63-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1100-68-0x000000000058A000-0x00000000005BA000-memory.dmp

    Filesize

    192KB

  • memory/1100-69-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1100-56-0x0000000000220000-0x0000000000273000-memory.dmp

    Filesize

    332KB